666010061505 has 16 divisors (see below), whose sum is σ = 1184017887360. Its totient is φ = 355205366064.

The previous prime is 666010061443. The next prime is 666010061533. The reversal of 666010061505 is 505160010666.

It is not a de Polignac number, because 666010061505 - 2⁶ = 666010061441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666010061505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2466703797 + ... + 2466704066.

It is an arithmetic number, because the mean of its divisors is an integer number (74001117960).

Almost surely, 2^666010061505 is an apocalyptic number.

It is an amenable number.

666010061505 is a deficient number, since it is larger than the sum of its proper divisors (518007825855).

666010061505 is a wasteful number, since it uses less digits than its factorization.

666010061505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933407877 (or 4933407871 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 666010061505 in words is "six hundred sixty-six billion, ten million, sixty-one thousand, five hundred five".